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Type: Posts; User: sgosine577

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  1. Replies
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    1,804

    Did you ever solved the problem...

    Did you ever solved the problem...
  2. Replies
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    874

    check your dual capacitor, it most likely bad.

    check your dual capacitor, it most likely bad.
  3. Replies
    3
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    759

    Yes the external equalized TXV is more efficient...

    Yes the external equalized TXV is more efficient and tend to try to maintain adequate refrigerant supply to the evaporator by monitoring the leaving pressure out of the evaporator. The bulb pressure...
  4. Replies
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    759

    EXTERNALLY EQUALIZED Externally equalized...

    EXTERNALLY EQUALIZED

    Externally equalized TXV's must be used when the pressure drop in the evaporator exceeds

    3 degrees F for Air Conditioning
  5. Thanks Dave, You explained it perfectly. But, is...

    Thanks Dave, You explained it perfectly. But, is it true that in low amblent charging, you have to add more refrigerant to the unit to allow it to maintain an adequate head and suction pressure. You...
  6. As I understand it, the headmaster valve is a...

    As I understand it, the headmaster valve is a head pressure control device. It has a rated pressure about 160 to 180 psi, When the pressure is below the rated pressure it closes to the condenser...
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    837

    Just a little quiz to break up the monotony

    Just a little quiz to break up the monotony
  8. Replies
    6
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    3,175

    If only the TXV and the distributer lines are...

    If only the TXV and the distributer lines are frosted, then check your superheat. The TXV is starving the evaporator. Adjust for proper superheat. If the suction pressure does not rise after you...
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    837

    BRAIN TEASER Refrigerant R408A Suction line...

    BRAIN TEASER

    Refrigerant R408A

    Suction line temp at evaporator: 45 DEG
    Suction pressure: 10PSI

    BOX TEMP 10 DEG

    1. What is the superheat
  10. Replies
    28
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    3,390

    Unit was setup for a semi-hermetic and 404-a, The...

    Unit was setup for a semi-hermetic and 404-a, The existing compressor was setup with poly oil. and Hotshot. I installed new filters both suction and liquid, flushed the system with FX11 and purged...
  11. Replies
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    755

    This is from EPA Releases of CFCs or HCFCs...

    This is from EPA

    Releases of CFCs or HCFCs that are not used as refrigerants. For instance, mixtures of nitrogen and R-22 that are used as holding charges or as leak test gases may be released,...
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    755

    They were outside the fence no visible view of...

    They were outside the fence no visible view of the equipment I was working with. They had a digital camera. I don't think that it is against the law to purge the system with nitrogen, is it?
  13. Replies
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    755

    Had a burnout on a compressor, recovered 16 lbs...

    Had a burnout on a compressor, recovered 16 lbs r404a and then proceeded to use 3 tanks of nitrogen to blow out the lines. I used 500 psi which resulted in a loud hiss and a cloud being released into...
  14. Replies
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    3,390

    I downloaded the datasheet from copeland and it...

    I downloaded the datasheet from copeland and it is rated as HFC, R404-A, 60 Hz, 3 - phase, 200-230 V, Extended Medium Temp. What is the difference between Medium Temp. and Extended Medium Temp.?
    ...
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    28
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    3,390

    The new compressor comes with polyester oil. and...

    The new compressor comes with polyester oil. and it is a medium temperature compressor. I must use a refrigerant that will mix properly with polyester. This leaves R507, R22, R134a, R404a.
  16. Replies
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    3,390

    Don't know what the previous refrigerant was. The...

    Don't know what the previous refrigerant was. The present compressor has a serial number of 95K68705H. Looks like copeland recommend R-404a.
  17. Replies
    28
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    3,390

    Replacing a defective hermetic compressor that is...

    Replacing a defective hermetic compressor that is noisy and not pumping. The refrigerant that was used was Hot Shot. The oil in the new compressor is Polyester and I want to use R404 or R134 for...
  18. Replies
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    1,035

    Changed power element and problem solved. ...

    Changed power element and problem solved.

    [Edited by sgosine577 on 02-10-2005 at 10:27 PM]
  19. Replies
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    1,035

    Looked at a walk-in cooler, Turned on unit and...

    Looked at a walk-in cooler, Turned on unit and suction pressure goes into a vacuum. Head pressure about 100 psi. Unit is using 409a. Sight glass show no bubbles.
    changed filter drier and checked LL...
  20. Replies
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    2,035

    It seems to me that you have any of the following...

    It seems to me that you have any of the following problems:

    1. under charged (most likely) indoor coil frozen in summer outdoor coil frozen in the winter. The reason for the water overflowing in...
  21. "Always on time or you don't pay a dime" Always...

    "Always on time or you don't pay a dime" Always there in one hour. Hell I am always a few minutes late. I will go out of business if I have to be there in 1 hour because of traffic and other factors.
  22. Replies
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    1,932

    Installed a 3hp copland semi-hermetic 3 phase...

    Installed a 3hp copland semi-hermetic 3 phase compresssor.
    Wired the compressor according to schematic. Unit is dropping temperature, but Will not pump-down. Shut-off liquid valve pressure on low...
  23. Replies
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    15,372

    I used to install armstrong until I installed a...

    I used to install armstrong until I installed a new condensing unit which had a plugged up condenser. The next day I talked to the distributer and he called armstrong and they would not replace the...
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